package guestbook;

import java.io.IOException;
import javax.servlet.http.*;

import com.google.appengine.api.users.User;
import com.google.appengine.api.users.UserService;
import com.google.appengine.api.users.UserServiceFactory;

@SuppressWarnings("serial")
public class GuestbookServlet extends HttpServlet {
  public void doGet(HttpServletRequest req, HttpServletResponse resp)
      throws IOException {
    UserService userService = UserServiceFactory.getUserService();
    User user = userService.getCurrentUser();

    if (user != null) {
        resp.setContentType("text/plain");
        resp.getWriter().println("Hello, " + user.getNickname());
    } else {
        resp.sendRedirect(userService.createLoginURL(req.getRequestURI()));
    }
  }
}
